/*
 * Copyright 2020-2030 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.extraty.question1929;

import java.util.Arrays;

/**
 * @author Created by Neil Wang
 * @version 1.0.0
 * @date 2021/9/6 11:38 上午
 */
public class Solution1 {
    public int[] getConcatenation(int[] nums) {
        return doubleColumns(nums, nums.length);
    }

    private int[] doubleColumns(int[] nums, int length) {
        int[] result = Arrays.copyOf(nums, length * 2);
        System.arraycopy(nums, 0, result, length, length);
        return result;
    }
}
